The City of Denton Pecan Creek Wastewater Treatment Facility has periodically failed effluent toxicity testing. A Toxicity Identification Evaluation has determined that Diazinon in the effluent is contributing to the observed toxicity. Chlorpyrifos is also implicated as a factor. The City of Denton constructed a half acre experimental wetland to remove Diazinon related toxicity. Results from spiking and microcosm experiments indicate that the wetland can reduce the Diazinon.

Two years before impoundment, the trophic status of Lake Ray Roberts was predicted by applying the total phosphorus input into the Organization for Economic Cooperation and Development (OECD) eutrophication model. Predicted mean summer epilimnetic (MSE) chlorophyll a of Elm Fork arm, Isle duBois arm and Main Body were in the eutrophic category of the OECD model. Observed MSE chlorophyll a two years after impoundment of Elm Fork arm, Isle duBois and Main Body had not reached their predicted means and were at the mesotrophic-eutrophic boundary of the OECD model. Six years after impoundment, observed MSE chlorophyll a for Main Body, was closer to its predicted mean and in the eutrophic category of the OECD model. Six years after impoundment, Elm Fork arm was the most productive area of Lake Ray Roberts. Observed means of chlorophyll a, total phosphates, suspended solids and turbidity were often highest in the Elm Fork arm. Wastewater effluent from Gainesville and Valley View, TX, had an impact on productivity in Elm Fork arm.

This study used the Health Belief Model to examine the predictors of AIDS preventive behavior. The independent variables were the variables of individual perception, modifying factors (psychological variables), and likelihood variables. The respondents, the Taiwanese students of the University of North Texas, were influenced both by Chinese sexuality and Western values in their AIDS-risk behavior. The results revealed that 90% of the respondents were misinformed on the availability of AIDS vaccine. In addition, a majority of the students were either abstaining from sex or practicing monogamy. Using Pearson's correlation coefficient and multiple regression analysis, this study found that the psychological variables rather than cognitive variables significantly influenced the respondents' AIDS preventive behavior. Finally, suggestions were made for future research on AIDS, and for AIDS preventive behavior campaigns.

The purpose of this study was to explore the effects of parental divorce and family conflict during adolescence on young adult females' social support and psychological adjustment. The three areas explored were perceptions of relationship satisfaction and closeness, sources and amount of social support and adjustment. One hundred and forty-one female undergraduates, 53% from families in which their parents are still married and 47% from families in which a parental divorce occurred during adolescence, completed the following measures: the Dyadic Adjustment Scale (Spanier, 1976), the Social Provisions Scale-Source Specific (Cutrona, 1989), the Inventory of Common Problems (Hoffman & Weiss, 1986), the Family Environment Scale (Moos & Moos, 1981), and the Sibling Relationship Questionnaire (Furman & Buhrmester, 1985).

In this study, a computer simulation model for library CD-ROM LAN systems was created. Using this model, the system optimization problems were examined. The simulation model imitated the process of the actual decision variables changing their values and generated the corresponding results. Under a certain system environment, if the values of decision variables are changing, the system performances are getting changed also. This study investigated these relationships with the created model. The system users' interarrival time, service time, and other relevant data were collected on randomly selected days in a university library. For data collection, both of the observation and the system automatic metering software were used. According to the collected data, a discrete events simulation model was created with GPSS/H. The simulation model was proven valid and accurate by a pilot test and by the calculation with queuing theory. Statistical tests were used for data comparison and analysis. In addition, animation technique was used to show the simulation process by using Proof Animation. By this technique, the simulation process was monitored on the screen.

This study investigated the effects of personality characteristics on emergent leadership in small group settings. Two instruments were used to assess personality factors: The BASIS-A and the California Personality Inventory (CPI). A sociometric tool was developed to elicit leader ranking of female group members. The BASIS-A, was used to test for Taking Charge and Wanting Recognition lifestyles in women who emerged as leaders. The CPI was used to assess female emergent leaders for Dominance and Leadership Potential. The two instruments and a sociometric form were distributed to 115 female graduate counselor-in-training students the last week of their group counseling experience. This survey resulted in 55 respondents (N=55) from eleven discussion groups. It was expected that women who had the highest averaged leader rank would demonstrate higher test scores in Dominance, Leadership Potential, Taking Charge, and Wanting Recognition than women who received a lower averaged leader rank. It was also thought that these four test factors would be highly related. If so, a case would be made to use the BASIS-A as an emergent leader assessment tool because it is consistently based in one psychological theory. No significant effect was found between the highest leader rank and three of the test …

This study examines the association between the attitudes of students toward computers and their knowledge of the ethical uses of computers. The focus for this research was undergraduate students in the Colleges of Arts and Sciences (Department of Computer Science), Business and Education at the University of North Texas in Denton, Texas.

A large, multi-basin, reservoir (Garza-Little Elm Reservoir) in north central Texas was studied to determine the relative effects of various parameters on primary productivity. The basins were impounded several years apart,thus allowing the influence of age on water chemistry and biota to be considered. Another principal influence on water quality was secondary sewage effluent that entered one basin from a nearby source.

Graduate students in the College of Education at the University of North Texas, Denton rated 57 teacher attributes on their relative importance in effective teaching. The data was analyzed across six demographic variables of department, sex, degree, nationality, teaching experience, and previous graduate school, using mean scores, one-way ANOVA, and t-tests for two independent samples.

Male and female college students were administered scales assessing their daily hassles, negative life events, control, commitment, challenge, psychological symptomatology, psychological distress, and physical symptomatology. Stepwise multiple regression analyses showed that control, commitment, and challenge act in an additive (rather than multiplicative) manner in relation to psychological and physical outcome measures.

This study sought to determine if different factors had influenced females and males to select engineering/science-related studies at the Texas Academy of Mathematics and Science (TAMS). The data were collected in the fall semester in 1997 at TAMS located on the University of North Texas campus from a survey of factors reported in the literature that had influenced students to enroll in engineering/science-related curriculum.

This descriptive study of 45 multi-generational families contributes empirical knowledge about grandparent-grandchild relationships. A questionnaire was developed and completed by 74 subjects who were part of a randomly selected sample taken from a tax roll of homeowners over age 65 in Denton County, Texas. The responses provide information which expands the existing data base in the area of grandparenting. The study pinpoints areas in the grandparenting literature which need refinement and contributes data to those areas, rather than producing a set of conclusions. Areas as yet undocumented or inadequately documented in the literature are identified as the following: (a) family structural composition; (b) grandparents' personal characteristics; (c) selected aspects of grandparent-grandchild contact; and (d) satisfaction with the grandparent role. Data for these areas should help reveal factors having an impact on grandparent-grandchild relationships. A base for further investigation in these areas is established, and data are also analyzed to determine satisfaction or lack of satisfaction with grandparenting. The seventy-four subjects, from 45 households, included 44 grandmothers and 30 grandfathers. The number of generations per family was used as the base to report the findings. The study substantiates other research on grandparenting, particularly in the area of timing of grand-parenthood. Data …

The main purpose of the study is to describe the developmental story of one of the larger university cooperative education programs in the United States to provide the evidence of outcomes and to utilize selected elements of the program in other colleges and universities. The study utilizes historical methodology with a descriptive approach to investigate and analyze the program's establishment, its development of staffing, organization, students, employers, funding, and its evaluation by using primary and secondary sources, annual reports, federal grant request proposals, evaluation reports, and the on-campus newspaper. The information for this study was also gathered through personal interviews with previous and present staff members of the program. The study shows that the program was established in the dean of students' office, but in order to get more support from the faculty, the program was moved to the academic affairs office. As a result of the academic support by the faculty, the program expanded. The findings show that the federal grant, Title VIII, contributed significantly to the initiation and growth of the program. The investigator observes that the director's leadership and the staff members' commitment to the program were two of the most important factors in the continued growth …

The problem of this study was to determine the academic, personal, social, and financial level of satisfaction of the international students at North Texas State University. The subjects were 351 international students representing fifty-four different countries. These students were enrolled full time during the fall semester of 1981. The instrument used to gather the data was a questionnaire. The questionnaire was validated by a panel of experts and pretested on a small sample of international students.

The primary purpose of this study was to investigate the relationship of the Type A behavior pattern to Holland's occupational types and the career choice process. The Type A behavior pattern is characterized by high levels of achievement striving, time urgency, chronic activation and hostility, and is an independent risk factor in the development of coronary heart disease. It was hypothesized that Type A college students would be more attracted than Type B individuals to aspects of a future work environment which would reinforce their Type A behaviors. Previous research had suggested a relationship between the Type A behavior pattern and Holland's Enterprising and Investigative types (Martin, 1986). This study sought to replicate those findings, and further examine the nature of the Type A/B-Holland types relationship. Data were collected from undergraduate students in a variety of academic fields of study. Subjects completed a questionnaire packet consisting of the student version of the Jenkins Activity Survey (Jenkins, Rosenman, and Zyzanski, 1965; Glass, 1977), the Vocational Preference Inventory (Holland, 1985b), and a modified version of the Minnesota Job Description Questionnaire (Rosen, et al., 1972) . The findings demonstrated that the Type A/B pattern is a significant factor in the career choice process. …

The subjects were 69 graduate faculty advisors, 187 foreign graduate students, and 184 American graduate students who were enrolled at North Texas State University in the Spring Semester, 1984. Statistical techniques used for data analysis include frequency distributions, percentages, means, and Mann-Whitney U test. Significant differences were determined by the two-tailed test of significance at or beyond the .05 level.

This study investigates different factors related to master's degree graduates 1965-1976 in Physical Education at North Texas State University in order to gain information about the master's degree program's relevance to the subsequent career. The findings of the study support the following conclusions: 1. Approximately two-thirds of the graduates thought the program had satisfactorily prepared them for their current positions. 2. Seventy per cent of the graduates suggested there should be a core of courses required in the master's degree program in physical education. The courses most often included in the responses regarding core courses were Research Perspective in Physical Education, Thesis, Mechanical Analysis of Motor Skills, Professional Preparation in Physical Education, Administrative Problems in Physical Education, and Testing in Physical Education. 3. The greatest strengths of the master's degree program in physical education at North Texas State University as reported by the graduates were faculty, research work for students, teaching resources and courses available. 4. The greatest weakness of the master's degree program in physical education at North Texas State University as indicated by the graduates was availability of facilities. 5. The majority of the graduates suggested the following: candidates should be free to select a variety of courses, …

Excessive nutrient loading of natural and artificial lakes has led, in some systems, to plethoric algal and aquatic macrophyte growth which can result in aesthetic degradation and undesirable tastes and odors. It would be advantageous to have some indication of the potential trophic status of a reservoir before it is filled. An objective of this study was to assess the water quality and nutrient loading potential of the tributaries entering Ray Roberts Lake, a large reservoir located in north central Texas. Samples from a maximum of thirteen sites were collected on the Elm Fork, Trinity River, Isle duBois Creek, and five additional tributaries. Data were also collected during six storms, from atmospheric deposition collectors, and from soil-water microcosms. The relationship between watershed landuse and mean water nutrient concentrations was evaluated. Significant differences will exist between the two major arms of Ray Roberts Lake: Elm Fork, Trinity River and Isle duBois Creek. While the majority of the annual phosphorus and nitrogen load entering both tributaries is coming from overland flow, the proportion is higher in Isle duBois Creek. Point sources in the Elm Fork contribute a larger percentage of the bioavailable phosphorus, which is significantly greater than in Isle duBois Creek. …

The purpose of this study was to investigate job satisfaction of full-time faculty members at a large multi-purpose university in relation to gender, rank, and types of activity. The population consisted of 664 full-time faculty members at North Texas State University during the spring semester, 1984. The questionnaire consisted of two parts, the Job Descriptive Index and The Faculty Data Sheet. The theoretical basis of the study was Herzberg's theory of Motivation-Hygiene.

The purpose of the study is to determine if there is an effect on intervention/nonintervention attitudes associated with an introductory microeconomics class. The population consisted of all students enrolled in eighteen sections of Economics 1100 during the Fall semester, 1984, at North Texs State University. There were seven sections of Economics 1100, ten sections of Sociology 1510, and ten sections of Political Science 2010 used as control groups. The instruments used for pretesting and posttesting were the twenty-three item Attitude Scale and Demographic Questionnaire. The Attitude Scale contained twelve intervention and eleven nonintervention questions. Intervention questions were reverse scored so that a high score is noninterventionist and a low score is interventionist. Data were analyzed using a multiple linear regression to determine how each variable affected the intervention/nonintervention student attitudes.

A group of 101 older adults (sixty-five years of age and over) who lived independently in three retirement apartment residences in Denton, Texas, were asked about their patterns of reading, television viewing, and radio listening habits for two periods in their lives: (1) at age forty to fifty-five and (2) at the present. Respondents were asked about their use of external information sources (public library, grocery store, newsstand, etc.) and their use of proximate information sources (radio, friends/relatives, television, etc.) They were also asked about access to transportation, income satisfaction, status of general health, vision, hearing, physical mobility and reasons for utilizing various information sources. Four hypotheses relating changes in health, environment, economic status, and education to reasons for reading and use of information sources were tested through the use of t-tests, regression analysis and analysis of variance. Within this group of older adults, use of external information sources decreased from the past to the present. There was, however, no change in the use of information sources located in or near the residence as difficulties in these areas increased. A relationship was found between educational level and reading for pleasure earlier in life. Also, those with higher educational levels reported …

The purposes of this study were to determine whether differences existed between the communication styles and teaching effectiveness, respectively, of native and non-native teaching fellows, as perceived by their undergraduate students. In addition, the study sought to determine whether a positive correlation existed between the final grades and the communication styles and teaching effectiveness, respectively, of native and non-native teaching fellows as perceived by their undergraduate students. In order to carry out the purposes of this study, six hypotheses were tested concerning the perception of native and non-native undergraduate students toward the communication style and teaching effectiveness of teaching fellows in North Texas State University.

The effects of the counselor's religious values on the counseling process has been a focal point recently in the literature on counseling and psychotherapy, especially with regard to how the counselor's announced values might effect potential clients' selection of a counselor. In the present study, the investigator addressed this issue in a study with 125 male and 125 female undergraduate students assigned to five different groups in which they read a script that differed with respect to the counselor's religious orientation. The content of the five scripts ranged from no mention of religious values to describing in detail the specific religious values of the counselor. Subjects' responses to the scripts were measured by having them rate (1) the degree of similarity in their own values and the announced values of the therapist; (2) their rating of how helpful they thought the therapist would be with their problem; and, (3) their stated willingness to see the counselor. Results indicated that subjects who read the script describing an agnostic counselor saw a significant degree of dissimilarity between their own and the counselor's values, but this did not affect subjects' perceptions of the counselor's helpfulness or their willingness to see the counselor. Differences …

The purpose of this study was to determine if students who participated in language arts remediation which was infused with critical thinking activities and metacognition would make greater gains in skills and achievement than those students who were remediated with a regular language arts curriculum. The population for this study was a group of at risk students who were fourteen to sixteen years old and who were participants in the 1987 summer Youth Opportunities Unlimited project at the University of North Texas. Their progress was measured with California Achievement Test and Iowa Test of Basic Skills pretests and posttests. The organization of the study includes a statement of the problem, a review of the literature, the methods and procedures used to collect the data, the analysis of data, and a summary of the findings, conclusions, educational implications, and recommendations tor additional research. Data from the eight hypotheses were treated with an analysis of covariance. The analysis of data revealed the following: 1. The infusion of critical thinking activities and metacognition did not improve students' skills or achievement in the following areas: spelling, capitalization, and punctuation. 2. The infusion of critical thinking activities and metacognition did not improve students' skills in …